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advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current * ul is a registered trademark of underwriters laboratories, inc. ? csa is a registered trademark of canadian standards association. ? vde is a trademark of verband deutscher elektrotechniker e.v. this product is intended for integration into end-user equipment . all of the required procedures of end-use equipment should be followed. document no: ads10-006 ver 0.3 pdf name: QBDW033A0B_ads.pd f barracuda? series features ? compliant to rohs eu directive 2002/95/ec (-z versions) ? compliant to rohs eu directive 2002/95/ec with lead solder exemption (non-z versions) ? high and flat efficiency profile >95.0% at 12v dc , 30% to 100% rated output ? wide input voltage range: 36-75v dc ? delivers up to 33a dc output current ? remote sense and output voltage trim ? fully regulated output voltage ? output voltage adjust: 8.1v dc to 13.2v dc ? low output ripple and noise ? industry standard, dosa compliant, quarter brick: 57.9 mm x 36.8 mm x 10.6 mm (2.28 in x 1.45 in x 0.42 in) ? constant switching frequency ? positive remote on/off logic ? output over current/voltage protection ? digital interface with pmbus? rev.1.1 compliance ? over temperature protection ? wide operating temperature range (-40c to 85c) ? ul* 60950-1 recognized, csa ? c22.2 no. 60950-1- 03 certified, and vde ? 0805:2001-12 (en60950-1) licensed ? ce mark 73/23/eec and 96/68/eec directives ? meets the voltage and current requirements for etsi 300-132-2 and complies with and licensed for basic insulation rating per en60950-1 ? 2250 vdc isolation tested in compliance with ieee 802.3 poe standards ? iso** 9001 and iso14001 certified manufacturing facilities applications ? distributed power architectures ? intermediate bus voltage applications ? servers and storage applications ? networking equipment including power over ethernet (poe) ? fan assemblies other systems requiring a tightly regulated output voltage options ? negative remote on/off logic ? active load sharing (parallel operation) ? baseplate option (-h) ? auto restart after fault shutdown description the QBDW033A0B series of dc-dc converters are a new generation of dc/dc power modules designed to support 9.6 -12vdc intermediate bus applications where multiple low voltages are subsequently generated using point of load (pol) converters, as well as other application requiring a tightly regulated output voltage. the QBDW033A0B series operate from an input voltage range of 36 to 75vdc and provide up to 33a output current at output voltages from 8.1v dc to 12v dc in a dosa standard quarter brick. the converter incorporates digital control, synchronous rectification technology, a fully regulated control topology, and innovative packaging techniques to achieve efficiency approaching 97% peak at 12v dc output. this leads to lower power dissipations such that for many applications a heat sink is not required. standard features include output voltage trim, remote sense, on/off control, output overcurrent and over voltage protection, over temperature protection, input under and over voltage lockout, power good signal and pmbus interface. the output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. built- in filtering for both input and output minimizes the need for external filtering. rohs compliant
advanced data sheet february 10, 2011 QBDW033A0B series power modu les; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 2 absolute maximum ratings stresses in excess of the absolute maximum ratings can cause permanent damage to the device. these are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely affect device reliability. parameter device symbol min max unit input voltage* continuous v in -0.3 75 v dc operating transient 100ms 100 v dc operating input transient slew rate, 50v in to 75v in (output may exceed regulation limits, no protective shutdowns shall activate, c o =220f to c o, max ) - - 12.5 v/s non- operating continuous v in 80 100 v dc operating ambient temperature all t a -40 85 c (see thermal considerations section) storage temperature all t stg -55 125 c i/o isolation voltage (100% factory hi-pot tested) all ? ? 2250 v dc * input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level. electrical specifications unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. parameter device symbol min typ max unit operating input voltage v in 36 48 75 v dc maximum input current i in,max - - 12 a dc (v in =0v to 75v, i o =i o, max ) input no load current all i in,no load 50 ma (v in = v in, nom , i o = 0, module enabled) input stand-by current all i in,stand-by 10 ma (v in = v in, nom , module disabled) inrush transient all i 2 t - - 1 a 2 s input reflected ripple current, peak-to-peak (5hz to 20mhz, 12 h source impedance; v in = 48v, i o = i omax ; see figure 10) all - 24 - ma p-p input ripple rejection (120hz) all - 50 - db caution: this power module is not internally fused. an input line fuse must always be used. this power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of sophisticated power architecture. to preserve maximum flexibility, internal fusing is not included, however, to achieve maximum safety and system protection, always use an input line fuse. the safety agencies require a fast-acting fuse with a maximum rating of tbd a (see safety considerations section). based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. refer to the fuse manufacturer?s data sheet for further information.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 3 electrical specifications (continued) parameter device symbol min typ max unit output voltage set-point (v in =v in,nom , i o =15a, t a =25c) all v o, set 11.84 12 12.12 v dc output voltage (over all operating input voltage, resistive load, and temperature conditions until end of life) v o -3.0 ? +3.0 % v o, set output regulation line (v in =v in, min to v in, max ) all ? ? 0.2 % v o, set load (i o =i o, min to i o, max ) all ? ? 0.2 % v o , set temperature (t a = -40oc to +85oc) all ? ? 1.0 % v o, set output voltage adjustment range (via trim resistor or pmbus) all 8.1 13.2 v dc output ripple and noise on nominal output (v in =v in, nom and i o =i o, min to i o, max ) rms (5hz to 20mhz bandwidth) all ? 70 ? mv rms peak-to-peak (5hz to 20mhz bandwidth) all ? 200 ? mv pk-pk external output capacitance all c o, max 220 ? 10,000 f output current all i o 0 33 a dc output current limit inception (adjustable via pmbus) all i o, lim ? 40 ? a dc efficiency (v in =v in, nom , v o = v o,set , t a =25c) i o = 50% i o, max i o = 100% i o, max all 96 95 % % switching frequency f sw tbd khz dynamic load response (dio/dt=1a/10 ? s; v in =v in ,nom; t a =25c; tested with a 10 f aluminum and a 1.0 f tantalum capacitor across the load.) load change from io= 50% to 75% of io,max: peak deviation settling time (vo<10% peak deviation) all v pk t s ? __ 300 700 ? __ mv pk ? s load change from io= 75% to 50% of io,max: peak deviation settling time (vo<10% peak deviation) v pk t s __ __ 300 700 __ mv pk ? s isolation specifications parameter symbol min typ max unit isolation capacitance c iso ? 1000 ? pf isolation resistance r iso 10 ? ? m ? general specifications parameter device min typ max unit calculated reliability based upon telcordia sr-332 issue 2: method i, case 1, (i o =80%i o, max , t a =40c, airflow = 200 lfm), 90% confidence mtbf all tbd hours fit all tbd 10 9 /hours weight ? open frame ? tbd ? g (oz.) weight ? with baseplate option ? tbd ? g (oz.)
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 4 feature specifications unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. see feature descriptions for additional information. parameter device symbol min typ max unit remote on/off signal interface (v in =v in, min to v in, max , signal referenced to v in- terminal) negative logic: device code suffix ?1? logic low = module on, logic high = module off positive logic: no device code suffix required logic low = module off, logic high = module on logic low specification on/off thresholds: remote on/off current ? logic low all i on/off 5 10 15 a logic low voltage all v on/off -0.3 ? 0.8 v dc logic high voltage ? (typ = open collector) all v on/off 2.0 ? 3.5 v dc logic high maximum allowable leakage current (v on/off = 2.0v) all i on/off ? ? 4.0 a maximum voltage allowed on on/off pin all v on/off ? ? 13.5 v dc turn-on delay and rise times (i o =i o, max ) (adjustable via pmbus) t delay = time until v o = 10% of v o,set from either application of vin with remote on/off set to on or operation of remote on/off from off to on with vin already applied for at least one second. all t delay, enable with vin ? tbd ? ms all t delay , enable with on/off ? tbd ? ms t rise = time for v o to rise from 10% of v o,set to 90% of v o,set . (adjustable via pmbus) t rise ? tbd ? ms output overvoltage protection (adjustable via pmbus) all 13 ? 17 v dc overtemperature protection (adjustable via pmbus) all t ref ? tbd ? c (see feature descriptions) (default) input undervoltage lockout (adjustable via pmbus) turn-on threshold (default) ? 34.5 36 v dc turn-off threshold (default) 31 31.5 ? v dc input overvoltage lockout (adjustable via pmbus) turn-off threshold (default) ? 81 82 v dc turn-on threshold (default) 78 79 ? v dc
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 5 characteristic curves the following figures provide typical characteristics for the QBDW033A0B (12v, 33a) at 25oc. the figures are identical for either positive or negative remote on/off logic. input current, i i (a) output voltage on/off voltage v o (v) (5v/div) v on/off (v) (2v/div) input voltage, v o ( v ) time, t ( 10 ms/div ) figure 1. typical input characteristic at room temperature. figure 4. typical start-up using remote on/off with vin applied, negative logic version shown. effciency, (%) output current output voltage i o (a) (10a/div) v o (v) (200mv/div) output current, i o ( a ) time, t ( 500 figure 2. typical converter efficiency vs. output current at room temperature. figure 5. typical transient response to step change in load from 25% to 50% to 25% of full load at room temperature and 48 vdc input. output voltage input voltage v o (v) (5v/div) v in (v) (20v/div) output current output voltage i o (a) (10a/div) v o (v) (200mv/div) time, t ( 20 ms/div ) time, t ( 500 figure 3. typical start-up using vin with remote on/off enabled, negative logic version shown. figure 6. typical transient response to step change in load from 50% to 75% to 50% of full load at room temperature and 48 vdc input.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 6 characteristic curves (continued) . output voltage, v o (v) v o (v) (50mv/div) input voltage, v in (v) time, t (1 ? s/div) figure 7. typical output voltage regulation vs. input voltage at room temperature. figure 9. typical output ripple and noise at room temperature and i o = i o,max . output voltage, v o (v) output current, i o (a) figure 8. typical output v oltage regulation vs. output current at room temperature. 36 vin 48 vin 75 vin
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 7 test configurations note: measure input reflected-ripple current with a simulated source inductance (ltest) of 12 h. capacitor cs offsets possible battery impedance. measure current as shown above. figure 10. input reflected ripple current test setup. note: use a 1.0 f ceramic capacitor and a 10 f aluminum or tantalum capacitor. scope measurement should be made using a bnc socket. position the load between 51 mm and 76 mm (2 in. and 3 in.) from the module. figure 11. output ripple and noise test setup. note: all measurements are taken at the module terminals. when socketing, place kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. figure 12. output voltage a nd efficiency test setup. design considerations input source impedance the power module should be connected to a low ac-impedance source. a highly inductive source impedance can affect the stability of the power module. for the test configuration in figure 10, a 330 f electrolytic capacitor, c in , (esr<0.7 ? at 100khz), mounted close to the power module helps ensure the stability of the unit. if the module is subjected to rapid on/off cycles, a 330 f input capacitor is required. consult the factory for further application guidelines. safety considerations for safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., ul60950-1, csa c22.2 no. 60950-1, and vde en60950-1. if the input source is non-selv (elv or a hazardous voltage greater than 60 vdc and less than or equal to 75vdc), for the module?s output to be considered as meeting the requirements for safety extra-low voltage (selv), all of the following must be true: ? the input source is to be provided with reinforced insulation from any other hazardous voltages, including the ac mains. ? one v in pin and one v out pin are to be grounded, or both the input and output pins are to be kept floating. ? the input pins of the module are not operator accessible. ? another selv reliability test is conducted on the whole system (combination of supply source and subject module), as required by the safety agencies, to verify that under a single fault, hazardous voltages do not appear at the module?s output. note: do not ground either of the input pins of the module without grounding one of the output pins. this may allow a non-selv voltage to appear between the output pins and ground. the power module has safety extra-low voltage (selv) outputs when all inputs are selv. the input to these units is to be provided with a maximum tbd a fast-acting (or time-delay) fuse in the unearthed lead. load contact and supply i i contact v i (+) v i (?) v o1 distribution losses resistance i o v o2
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 8 feature descriptions overcurrent protection to provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting continuously. if the overcurrent (iout_oc) condition causes the output voltage to fall below tbdv , the module will shut down and remain latched off. the overcurrent latch is reset by either cycling the input power or by toggling the on/off pin for one second. if the output overload condition still exists when the module restarts, it will shut down again. this operation will continue indefinitely until the overcurrent condition is corrected. a factory configured auto-restart option is also available. an auto-restart feature continually attempts to restore the operation until fault condition is cleared. the iout_oc _warning and fault threshold levels, and iout_oc_fault_response can be reconfigured via the pmbus interface. remote on/off [control](i) the module contains a standard on/off control circuit reference to the v in (-) terminal. two factory configured remote on/off logic options are available. positive logic remote on/off turns the module on during a logic-high voltage on the on/off(i) pin, and off during a logic low. negative logic remote on/off turns the module off during a logic high, and on during a logic low. negative logic, device code suffix "1," is the factory-preferred configuration. the on/off(i) circuit is powered from an internal bias supply, derived from the input voltage terminals. to turn the power module on and off, the user must supply a switch to control the voltage between the on/off(i) terminal and the v in (-) terminal (v on/off (i)). the switch can be an open collector or equivalent (see figure 13). a logic low is v on/off (i) = -0.3v to 0.8v. the typical i on/off (i) during a logic low is tbda. the switch should maintain a logic-low voltage while sinking tbda. during a logic high, the maximum v on/off (i) generated by the power module is tbdv. the maximum allowable leakage current of the switch at v on/off (i)= 2.0v is tbda. if using an external voltage source, the maximum voltage v on/off (i) on the pin is tbdv with respect to the v in (-) terminal. if not using the remote on/off feature, perform one of the following to turn the unit on: for negative logic, short on/off(i) pin to v in (-). for positive logic: leave on/off(i) pin open. figure 13. remote on/off implementation. remote on/off [control](o) the module contains an configurable on/off control circuit reference to the v o (-) terminal. two factory configured remote on/off logic options are available. positive logic remote on/off turns the module on during a logic-high voltage on the on/off pin, and off during a logic low. negative logic remote on/off turns the module off during a logic high, and on during a logic low. the logic of the on/off(o) pin shall match the logic of the on/off(i) pin. negative logic, device code suffix "1," is the factory- preferred configuration. the on/off(o) circuit is powered from an internal bias supply, derived from the output bias voltage. to turn the power module on and off, the user must supply a switch to control the voltage between the on/off (o) terminal and the v o (-) terminal (v on/off (o)). the switch can be an open collector or equivalent (see figure 13). a logic low is v on/off (o) = -0.3v to 0.8v. the typical i on/off (o) during a logic low is tbda. the switch should maintain a logic-low voltage while sinking tbda. during a logic high, the maximum v on/off (o) generated by the power module is tbdv. the maximum allowable leakage current of the switch at v on/off (o) = 2.0v is tbda. if using an external voltage source, the maximum voltage v on/off on the pin is tbdv with respect to the v i (-) terminal. if not using the remote on/off feature, perform one of the following to turn the unit on: for negative logic, short on/off(o) pin to v i (-). for positive logic: leave on/off(o) pin open. when both on/off(i) and on/off(o) are present, the module shall operate if either is asserted. using mfgr_specif commands, it shall be possible to reconfigure the on/off logic between positive and negative via pmbus, and it shall also be possible to reconfigure the combination of on/off(i) and on/off(o) from or to and for module operation. output overvoltage protection the output overvoltage protection consists of a control circuit, independent of the primary regulation loop, that monitors the voltage on the output terminals and clamps the voltage when it exceeds the overvoltage set point. the control loop of the clamp has a higher voltage set point than the primary loop. this provides a redundant voltage control that reduces the risk of output overvoltage. overtemperature protection these modules feature an overtemperature protection circuit to safeguard against thermal damage. the circuit shuts down and latches off the module when the maximum device reference temperature is exceeded. the module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. input under/over voltage lockout at input voltages above or below the input under/over voltage lockout limits, module operation is disabled. the module will begin to operate when the input voltage level changes to within the under and overvoltage lockout limits.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 9 feature descriptions (continued) remote sense remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections (see figure 11). the voltage between the remote-sense pins and the output terminals must not exceed the output voltage sense range given in the feature specifications table: [v o (+) ? v o (?)] ? [sense(+) ? sense(?)] ? 0.5 v although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. the maximum increase is the larger of either the remote sense or the trim. the amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. when using remote sense and trim, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power (maximum rated power = vo,set x io,max). figure 11. circuit configuration for remote sense . configurable control pins the QBDW033A0B contains two configurable control pins, t/c1 and c2, referenced to the module secondary siggnd. see mechanical views for pin locations. the following table list the available factory configurations for the functions assigned to these pins. additional configurations can accomplished via the pmbus interface. following the tables, there is a feature description for each function. pin designation/function factory configuration t/c1 c2 trim tm power good pg modules without -p load share cs power good pg modules with -p c2 pin designation/function configurable via pmbus power good pg on/off(o) trim, output voltage programming, tm trimming allows the output voltage set point to be increased or decreased; this is accomplished by connecting an external resistor between the trim pin and either the v o (+) pin or the v o (-) pin. v o (+) t/c1 v o (-) r trim-down lo ad QBDW033A0B r trim-up figure 12. circuit configuration to trim output voltage. connecting an external resistor (r trim-down ) between the t/c1 pin and the vo(-) (or sense(-)) pin decreases the output voltage set point. to maintain set point accuracy, the trim resistor tolerance should be 1.0%. the following equation determines the required external resistor value to obtain a percentage output voltage change of % ?? ? ? ? ? ? ? ? ? ? ? 22 . 10 % 511 down trim r where 100 % , , ? ? ? ? ? ? ? ? ? ? ? ? set o desired set o v v v for example, to trim-down the output voltage of the module by 20% to 9.6v, rtrim-down is calculated as follows: 20 % ? ? ?? ? ? ? ? ? ? ? ? ? 22 . 10 20 511 down trim r ? ? ? k r down trim 3 . 15 connecting an external resistor (r trim-up ) between the t/c1 pin and the v o (+) (or sense (+)) pin increases the output voltage set point. the following equations determine the required external resistor value to obtain a percentage output voltage change of %: ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 22 . 10 % 511 % 225 . 1 %) 100 ( 11 . 5 , set o up trim v r where 100 % , , ? ? ? ? ? ? ? ? ? ? ? ? set o set o desired v v v for example, to trim-up the output voltage of the module by 5% to 12.6v, r trim-up is calculated is as follows: 5 % ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 22 . 10 5 511 5 225 . 1 ) 5 100 ( 0 . 12 11 . 5 up trim r ?? ? ? 2 . 102 up trim r v o (+) sense(+) sense(?) v o (?) v i (+) v i (-) i o load cont act and distribution loss e suppl y i i contact resist ance
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 10 feature descriptions (continued) the voltage between the vo(+) and vo(?) terminals must not exceed the minimum output overvoltage protection value shown in the feature specifications table. this limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment trim. although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. the maximum increase is the larger of either the remote sense or the trim. the amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. when using remote sense and trim, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power (maximum rated power = v o,set x i o,max ). active load sharing, cs for additional power requirements, the QBDW033A0B power module can be configured for parallel operation with active load sharing. good layout techniques should be observed for noise immunity when using multiple units in parallel. to implement active load sharing, the following requirements should be followed: ? the vout(+) and vout(-) plan es of all parallel modules must be connected together with output traces from each module as short as possible to common power planes. ? the sense(+) and sense(-) connections to each module should come from a single point in each power plane. ? the current share (cs) pins of all units in parallel must be connected together. the path of these connections should be as direct as possible. siggnd is the return for the cs signal for each module; therefore, all modules in parallel must use the same siggnd. ? these modules contain circuitry to block reverse current flow upon start-up, when output voltage is present from other parallel modules, eliminating the requirement for external output oring devices. however, output oring devices should be used, if fault tolerance is desired in parallel applications. ? when not using the parallel feature, leave the cs open. power good, pg the QBDW033A0B modules provide a power good (pg) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. the pg signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going tbd% outside the setpoint value. the pg terminal should be connected through a pullup resistor (suggested value tbdk ? ) to a source of tbdv dc or less. thermal considerations the power modules operate in a variety of thermal environments and sufficient cooling should be provided to help ensure reliable operation. thermal considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. a reduction in the operating temperature of the module will result in an increase in reliability. the thermal data presented here is based on physical measurements taken in a wind tunnel. heat-dissipating components are mounted on the top side of the module. heat is removed by conduction, convection and radiation to the surrounding environment. proper cooling can be verified by measuring the thermal reference temperature (th x ). peak temperature (th x ) occurs at the position indicated in figure 14 and 15. for reliable operation this temperature should not exceed the listed temperature threshold. . figure 14. location of the thermal reference temperature th. figure 15. location of the thermal reference temperature th 3 for baseplate module.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 11 feature descriptions (continued) the output power of the module should not exceed the rated power for the module as listed in the ordering information table. although the maximum th x temperature of the power modules is 110 c - 125 c, you can limit this temperature to a lower value for extremely high reliability. please refer to the application note ?thermal characterization process for open-frame board-mounted power modules? for a detailed discussion of thermal aspects including maximum device temperatures. heat transfer via convection increased airflow over the module enhances the heat transfer via convection. the thermal derating of figure 16 shows the maximum output current that can be delivered by each module in the indicated orientation without exceeding the maximum th x temperature versus local ambient temperature (t a ) for air flows of, natural convection, 1 m/s (200 ft./min), 2 m/s (400 ft./min). the use of figures 16 is shown in the following example: example what is the minimum airflow necessary for a QBDW033A0B operating at v i = 48 v, an output current of 22a, and a maximum ambient temperature of 70 c in transverse orientation. solution: given: v in = 48v, i o = 22a, t a = 70 c determine required airflow (v) (use figure 16): v = tbd or greater. output current, i o (a) local ambient temperature, t a ( ? c) figure 16. output current derating for the open frame QBDW033A0B in the transverse orientation; airflow direction from vin(+) to vin(-); vin = 48v.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 12 layout considerations the qbdw033 power module series are low profile in order to be used in fine pitch system card architectures. as such, component clearance between the bottom of the power module and the mounting board is limited. avoid placing copper areas on the outer layer directly underneath the power module. also avoid placing via interconnects underneath the power module. for additional layout guide-lines, refer to fltr100v10 data sheet. through-hole lead-free soldering information the rohs-compliant, z version, through-hole products use the sac (sn/ag/cu) pb-free solder and rohs-compliant components. the non-z version products use lead-tin (pb/sn) solder and rohs-compliant components. both version modules are designed to be processed through single or dual wave soldering machines. the pins have an rohs-compliant, pure tin finish that is compatible with both pb and pb-free wave soldering processes. a maximum preheat rate of 3 ? c/s is suggested. the wave preheat process should be such that the temperature of the power module board is kept below 210 ? c. for pb solder, the recommended pot temperature is 260 ? c, while the pb-free solder pot is 270 ? c max. not all rohs-compliant through- hole products can be processed with paste-through-hole pb or pb-free reflow process. if additional information is needed, please consult with your lineage power representative for more details. post solder cleaning and drying considerations post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. the result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. for guidance on appropriate soldering, cleaning and drying procedures, refer to lineage power board mounted power modules: soldering and cleaning application note (ap01-056eps). pmbus the QBDW033A0B series is equipped with a digital pmbus interface to allow the module to be configured, and communicate with system controllers. detailed timing and electrical characteristics of the pmbus can be found in the pmb power management protocol specification, part 1, revision 1.1, available at http://pmbus.org . the QBDW033A0B supports both the 100khz and 400khz bus timing requirements. the QBDW033A0B is permitted to stretch the clock, as long as it does not exceed the maximum clock lo period of 35ms. all communication over the QBDW033A0B device pmbus interface is required to support the packet error checking (pec) scheme. the pmbus master must generate the correct pec byte for all transactions and check the pec byte returned by the QBDW033A0B. the QBDW033A0B supports a subset of the commands in the pmbus 1.1 specification. most all of the controller parameters can be programmed using the pmbus and stored as defaults for later use. all commands that require data input or output use the linear format. the exponent of the data words is fixed at a reasonable value for the command and altering the exponent is not supported. direct format data input or output is not supported by the QBDW033A0B. the supported commands are described in greater detail below. the QBDW033A0B also supports the smbalert response protocol. the smbalert response protocol is a mechanism by which a slave (the QBDW033A0B) can alert the bus master that it wants to talk. the master processes this event and simultaneously addresses all slaves on the bus (that support the protocol) through the alert response address. only the slave(s) that caused the alert acknowledges this request. the host performs a modified receive byte operation to get the slave?s address. at this point, the master can use the pmbus status commands to query the slave that caused the alert. for more information on the smbus alert response protocol, see the system management bus (smbus) specification. the QBDW033A0B contains non-volatile memory that is used to store configuration settings and scale factors. the settings programmed into the device are not automatically saved into this non-volatile memory though. the store_default_all command must be used to commit the current settings to non-volatile memory as device defaults. the settings that are capable of being stored in non-volatile memory are noted in their detailed descriptions.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 13 supported pmbus commands memory pmbus management command name transaction type number of data bytes data description access min max default resolution steps units 0 3 h clear_faults send byte 0 1 1 h store_default_all send byte 0 12 h restore_default_all send byte 0 7 9 h status_word read word 2 7 e h status_cml read byte 1 f 0 h mfr_module_date_loc_sn read word 2 cmd code output voltage pmbus management command name transaction type number of data data description access min max default resolution steps units 0 1 h operation r/w byte 1 customer r/w 0 2 h on_off_config r/w byte 1 customer r/w 2 1 h vout_command r/w w ord 2 linear customer r/w v 2 3 h vout_cal_offset r/w w ord 2 linear f acto ry r/w o nly v 2 5 h vout_margin_high r/w w ord 2 linear customer r/w v 2 6 h vout_margin_low r/w w ord 2 linear customer r/w v 2 8 h vout_droop r/w w ord 2 linear customer r/w mv/a (m?) 4 0 h vout_ov_fault_limit r/w w ord 2 linear customer r/w v 4 1 h vout_ov_fault_response r/w byte 1 customer r/w 6 0 h ton_delay r/w w ord 2 linear customer r/w ms 6 1 h ton_rise r/w w ord 2 linear customer r/w ms 7 a h status_vout read byte 1 8 b h read_vout read w ord 2 d 0 h mfr_vout_read_cal_gain r/w w ord 2 d 1 h mfr_vout_read_cal_offset r/w w ord 2 d 4 h mfr_loop_comp_breaks r/w word 2 e 1 h mfr_multi_on_off_pin_conf i r/w word 2 cmd code input voltage pmbus management command name transaction type number of data data description access min max default resolution steps units 3 5 h vin_on r/w w ord 2 linear v 3 6 h vin_off r/w w ord 2 linear v 5 5 h vin_ov_fault_limit r/w w ord 2 linear v 5 6 h vin_ov_fault_response r/w byte 1 7 c h status_input read byte 1 8 8 h read_vin read w ord 2 d 2 h mfr_vin_read_cal_gain r/w word 2 d 3 h mfr_vin_read_cal_offset r/w word 2 cmd code 10.5.1. response to voltage output current pmbus management command name transaction type number of data data description access min max default resolution steps units 4 6 h iout_oc_fault_limit r/w w ord 2 linear 4 7 h iout_oc_fault_response r/w byte 1 4 a h iout_oc_w arn_limit r/w w ord 2 linear 7 b h status_iout read byte 1 8 c h read_iout read w ord 2 10.5.1. response to voltage cmd code temperature protection pmbus management command name transaction type number of data data description access min max default resolution steps units 4 f h ot_fault_limit r/w w ord 2 linear c 5 0 h ot_fault_response r/w byte 1 5 1 h ot_w arn_limit r/w w ord 2 linear c 7 d h status_temperature_1 read byte 1 8 d h read_temperature_1 read word 2 10.5.1. response to voltage cmd code power good pmbus management command name transaction type number of data data description access min max default resolution steps units 5 e h power_good_on r/w word 2 5 f h power_good_off r/w word 2 e 0 h mfr_multi_pin_config r/w byte 1 e 2 h mfr_pow er_good_polarity r/w byte 1 cmd code
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 14 mechanical outline for QBDW033A0B through-hole module dimensions are in millimeters and [inches]. tolerances: x.x mm ? 0.5 mm [x.xx in. ? 0.02 in.] (unless otherwise indicated) x.xx mm ? 0.25 mm [x.xxx in ? 0.010 in.] top view* side view bottom view pin ? number ? pin ? name ? 1 ? vin ( + ) ? 2 ? on / off ? 3 ? vin ( \ ) 4 ? vout ( \ ) 5 ? sense ( \ ) 6 ? trim / c1 ? 7 ? sense ( + ) ? 8 ? vout ( + ) ? 9 ? c2 ? 10 ? sig _ gnd ? 11 ? data ? 12 ? smbalert ? 13 ? clk ? 14 ? addr1 ? 15 ? addr0 ? *top side label includes lineage power name, product designation, and data code. ** standard pin tail length. optional pin tail lengths shown in table 2, device options.
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 15 mechanical outline for QBDW033A0B?h (baseplate version) module dimensions are in millimeters and [inches]. tolerances: x.x mm ? 0.5 mm [x.xx in. ? 0.02 in.] (unless otherwise indicated) x.xx mm ? 0.25 mm [x.xxx in ? 0.010 in.] top view side view* bottom view*** pin ? number ? pin ? name ? 1 ? vin ( + ) ? 2 ? on / off ? 3 ? vin ( \ ) 4 ? vout ( \ ) 5 ? sense ( \ ) 6 ? trim / c1 ? 7 ? sense ( + ) ? 8 ? vout ( + ) ? 9 ? c2 ? 10 ? sig _ gnd ? 11 ? data ? 12 ? smbalert ? 13 ? clk ? 14 ? addr1 ? 15 ? addr0 ? *side label includes product designation, and data code. ** standard pin tail length. optional pin tail lengths shown in table 2, device options. ***bottom label includes lineage power name, product designation, and data code
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current lineage power 16 recommended pad layouts dimensions are in millimeters and [inches]. tolerances: x.x mm ? 0.5 mm [x.xx in. ? 0.02 in.[ (unless otherwise indicated) x.xx mm ? 0.25 mm [x.xxx in ? 0.010 in.] through-hole modules pin ? number ? pin ? name ? 1 ? vin ( + ) ? 2 ? on / off ? 3 ? vin ( \ ) 4 ? vout ( \ ) 5 ? sense ( \ ) 6 ? trim / c1 ? 7 ? sense ( + ) ? 8 ? vout ( + ) ? 9 ? c2 ? 10 ? sig_gnd ? 11 ? data ? 12 ? smbalert ? 13 ? clk ? 14 ? addr1 ? 15 ? addr0 ?
advanced data sheet february 10, 2011 QBDW033A0B series power modules; dc-dc converters 36-75v dc input; 9.6-12v dc output; 33a output current document no: ads10-006 ver 0.3 pdf name: QBDW033A0B_ads.pdf ordering information please contact your lineage power sales representative for pricing, availability and optional features. table 1. device codes product codes input voltage output voltage output current efficiency connector type comcodes QBDW033A0B41z 48v (36 ? 75vdc) 12v 33a 96% through hole tbd QBDW033A0B41-hz 48v (36 ? 75vdc) 12v 33a 96% through hole tbd QBDW033A0B41-phz 48v (36 ? 75vdc) 12v 33a 96% through hole tbd table 2. device options characteristic definition form factor q q = quarter brick family designator bd bd = b arracu d a series input voltage w w = wide range, 36v-75v output current 033a0 033a0 = 0 33.0 amps maximum output current output voltage* b b =12.0v nominal omit = default pin length shown in mechanical outline figures 8 8 = pin length: 2.79 mm 0.25mm , (0.110 in. 0.010 in.) 6 6 = pin length: 3.68 mm 0.25mm , (0.145 in. 0.010 in.) 5 5 = pin length: 6.35 mm 0.25mm , (0.250 in. 0.010 in.) omit = latching mode 4 4 = auto-restart following shutdown (overcurrent/overvoltage) omit = positive logic 1 1 = negative logic omit = standard open frame module p p = active load sharing (parallel operation) h h = heat plate, for use with heat sinks or cold-walls customer specific xy xy = customer specific modified code, omit for standard code omit = rohs 5/6, lead based solder used z z = rohs 6/6 compliant, lead free character and position pin length * feature may be reconfigured from factory default using pmbus. see feature descriptions for additional details. rohs ratings action following protective shutdown* on/off logic* mechanical features options world wide headquarters lineage power corporation 601 shiloh road, plano, tx 75074, usa +1-800-526-7819 (outside u.s.a.: +1-972-244-9428 ) www.lineagepower.com e-mail: techsupport1@lineagepower.com asia-pacific headquarters tel: +65 6593 7211 europe, middle-east and africa headquarters tel: +49 89 878067-280 india headquarters tel: +91 80 28411633 lineage power reserves the right to make changes to the product(s) or information contained herein without notice. no liability is assumed as a result of their use or a pplication. no rights under any patent accompany the sale of any such product(s) or information. lineage power dc-dc products are protected under various patents. information on these patents is available at www.lineagepower.com/patents . ? 2009 linea g e power cor p oration , ( plano , texas ) all international ri g hts reserved.

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